Feature:
    ** Measuring pH Range: 0.0 - 14.0 pH.
    ** Resolution: 0.1 pH.
    ** Accuracy: ±0.1 pH (20°C)， ±0.2 pH.
    ** Operating Temperature: 0 - 50°C (32-122°F).
    ** Relative Humidity: !#!lt!*!95%.
    ** Life: approx.700hours of use.
    ** Calibration: manual，1 point.(not included)
    ** Power: 3 x 1.5V(AG-13 button battery)(included).
    ** Size: 15.2cm x 2.8cm x 1.5cm.

Package Included:
 
1 x Digital PH Meter Tester Pen Aquarium
1 x screw driver